Resilient mounting



Jan.. mi, 95@ F, F. KISHLINE ZAQ@ RESILIENT MOUNTING Filed Sept. 14, 1948 FLOYD F.. Kim-MINE' JNI/ENTOR.

N13 MTTONEY vthe pump shaft. fof the pump hou-sing accommodates sleeve bear- Patented Jan. 3l, 1950 RESILIENT MOUNTING Floyd F. Kishline, Kenosha, Wis., assigner to Nash-Kelvinator Corporation, Kenosha, Wis., a corporation of Maryland p Application September 14,1948, Serial No. 49,167

6 Claims.

` This invention relates to a mounting for a lrotating shaft and is particularly suitable for ,use in connection with a water pump assembly `such as for automotive use.

y It is one object of the invention to provide a resilient `mounting which will permit self-alignment of the driven shaft relative to the driving shaft.

Another object of the invention is to provide a resilient mounting which insulates the driven shaft bearings and packings from engine vibration.

Another object of the invention is to provide a resilient mounting which permits a, two-piece pump housing assembly, said resilient mounting serving as a seal between the two pieces which `make up the pump housing assembly.

A further object of the invention is to provide a two-piece pump housing assembly which is simple to manufacture and which may be readily assembled in conjunction with the resilient mounting.

In the prior art the use of a rubber O ring to support a stationary cap relative to a stationary container has been known.

It has also been proposed to insert a ring of 'elastic material and of rounded cross section between two rotating members to form an elastic driving connection between said members.

In the automotive art it has been common practice to employ a Water pump wherein the water pump shaft is driven `by the generator shaft, said shafts being end to end and coupled vtogether by means of a flexible sleeve connection; The Water pump housing is formed of a single casting which is secured to the engine block and which casting is provided with a sleeve-like extension which serves as a bearing retainer for This bearing retainer portion ings and packing material, the bearings supporting the pump shaft and the packing material preventing escape of water from the pump chainber. In such aV construction the pump shaft bearings and the packing material are continuously subjected to engine vibration due to the pump housing being secured to the engine block. In this type of construction machining tolerances must be quite closely maintained in order that the bearing retainer, bearings and the pump shaft would be in substantially longitudinal axial alignment with the axis of the generator shaft.

In the present invention by making the pump housing of a two-piece structure and interposing an elastic 0 ring between said pieces I am able to reduce the amount of vibration to which the bearings and bearing retainer are subjected and in addition thereto I provide a seal to prevent escape of Water from `the pump chamber, and still further, I provide an elastic mounting for the bearing retainer which permits self-alignment of the pump shaft with the generator .shaft thereby substantially eliminating the necessity of holding close machining tolerances.

Other objects of my invention will be apparent in the following specification and in the accompanying drawings, in which:

Figure l is a side elevation showing my invention as employed in a water pump for use with an automobile engine;

Figure 2 is a sectional view showing my invention as used with a water pump assembly; and

Figure 3 is a sectional view taken on line 3 of Figure 2.

I have shown one embodiment of my invention as it may be used with a water pump cn an automobile engine. The engine 2 drives the conventional fan-shaft 3 which in turn through V-belt 4 drives generator shaft 5 of generator 6. The generator shaft 5 is coupled to Water pump shaft 1 through the medium of a exible sleeve 8 which may be secured to each shaft by means of pins 3. An impeller I9 is secured to the free end of pump shaft I by means of a pin II. The Water pump housing comprises a pump chamber casting I2 and bearing retainer sleeve I3. Sleeve bearings I Il support pump shaft 1 relative to bearing retainer I3. Packing material I5 compressed by spring IS prevents water from escaping out of pump chamber I'I along shaft l. The bearing retainer I3 is supported relative to pump housing I 2 through the medium of an elastic rubber-like O ring I3 which is interposed between bearing retainer sleeve E3 and pump housing I2.

Sleeve I3 is provided with an annular groove I9 and is beveled at 20. The pump housing I2 has a flange portion 2I to accommodate a cylindrical opening 22. Flange portion 2l is countersunk at 23 and is provided with an annular groove 24. When it is desired to assemble sleeve I3 relative to housing I2, the elastic O ring I8 is positioned on the beveled portion 2i! of sleeve I3 against the countersunk portion 23 of housing I2. As pressure is applied at the outer end of sleeve I3 the elastic ring I8 is compressed and rides along with sleeve I3 until it reaches annular groove 24 where it remains until sleeve I3 is moved inwardly far enough to permit the ring I8 to slip into the annular groove I 9, whereupon the assembly of sleeve I3 relative to housing I2 is completed. When the elastic ring I8 comes at rest in grooves I9 and 24 it is still in a compressed condition thereby effectively sealing olf pump chamber I'I. The elastic ring I8 provides the sole support mounting between housing I2 and sleeve I3. It can thus be seen that the use of a single elastic ring permits the pump housing to be made of two separate pieces whereby the sleeve I3 is insulated from engine vibration, thereby reducing wear and tear on bearings I4 and packing material I5. This same elastic ring I8 permits self-alignment of the pump shaft "I longitudinally with respect to the axis of generator shaft 5.

Having thus described my invention, what I claim is:

1. In combination with a pump having a driving shaft, a driven shaft, a iiexible coupling between the driving and driven shafts, an impeller and a pump housing having a mouth; a shaft supporting sleeve telescoped into the mouth of the pump housing in substantial axial alignment with the drive and driven shafts, a rubber-like ringinterposed between the sleeve and housing and serving to seal off the mout-h of the housing and to-yieldably support the sleeve within the housing, said rubbernlike ring being spaced from theiiexible coupling' a substantial distance and being .in a permanently compressed condition whereby to lend adequate supporting rigidity to the sleeve so that the sleeveV functions as a stationary bearing retainer for the rotative driven shaft.

2. In combination with a pump having aA driving shaft, .a driven shaft, a flexible coupling between the driving and driven shafts, an impeller and a pump housing having a mouth; a sleeve embracing the driven shaft and protruding into .the mouth of the housing in substantial axial alignment with the drive and drivenshafts, the exterior surface of said sleeve having an annular groove, anannular groove in the housingatfthe mouth thereof, a rubber-like ring interposed between the housing and sleeve within the annular grooves, said rubber-like ring being spaced from theyflexible coupling .a substantial distance and being in -a permanently compressed condition `whereby to lend adequate supporting rigidity to the sleeve'so that the sleeve functions as a stationaryfbearing retainer for the, rotative driven shaft.

3. A pumplmountingV as setV forth in claim 2 wherein the mouth yof thehousing is counter sunk the. end ofthe sleever is bevelledto facilitate assembly of therubber-like ring into the annular grooves.

4. In combination withrapump assemblyY havinga driveishaft, a` driven shaft, an impeller anda flexible coupling betweenthe driving and `bearing retainer beingsepara-te from the .housing z supporting means for the rotative driven shaft.

5. In combination with -a pump assembly having a drive shaft, a driven shaft, an impeller anda exible coupling between the driving and .driven shafts; a pump housing with a chamber accommodatingthe impeller, one face of the housing having a mouth, a bearing retainer for the driven shaft in substantial axial alignment with the-drive and driven shafts, said bearing retainer extending into the mouth of the housing and having its .external surface spaced from the wall dening'the mouth of the housing, a compressible member interposedbetween the bearing retainer and the housing, said compressible member being spaced from the iiexible coupling a substantial distance and being in a permanently compressed condition-whereby to lend adequate supporting rigidity to the bearing retainer so that the bearing retainer functions as a stationary supporting means for the rotativedriven shaft. n

6.; In combination with a pump assembly having a drive shaft, a driven shaft, an impeller and aV flexible coupling betweenthe driving and driven shafts; apumphousing with aachamber accommodating the impeller, one face ofthe'housing having a mouth, a bearing retainer for. the driven shaft in substantial axial alignment with the drive and driven shafts, said bearing retainer extending into the mouth of the housingl and having its external surface spaced from the Wall defining the mouth of the housing, a rubber-like compressible ring interposed between the bearing retainer andthe housing, said compressiblemember being spaced from the exible coupling la substantial distance and being ina permanently compressed condition whereby to lend adequate supporting rigidity tothe bearing retainer so that the bearing retainer functions asy a sta'- tionary. supporting means for the rotativedrive'n shaft.

FLOYD F. firstname,

REFERENCES CITED The'following references are of record in the Y:die of this patent:

UNITED STATES PATENTS Number Name Date 475,311 Hart May 24,A 1892 2,116,699 Chamberlain May 8, 1938 .FOREIGN PATENTS Number Country Date Y 543,733 f Great Britain Mar. 10, 1942 

